[QGIS Commit] r15894 - in docs/trunk/english_us/user_guide: .
working_with_raster_screenies
svn_qgis at osgeo.org
svn_qgis at osgeo.org
Thu Jul 28 06:33:56 EDT 2011
Author: dassau
Date: 2011-07-28 03:33:56 -0700 (Thu, 28 Jul 2011)
New Revision: 15894
Modified:
docs/trunk/english_us/user_guide/working_with_raster.tex
docs/trunk/english_us/user_guide/working_with_raster_screenies/rasterPropertiesDialog.png
docs/trunk/english_us/user_guide/working_with_raster_screenies/raster_calculator.png
Log:
updates to the raster section
Modified: docs/trunk/english_us/user_guide/working_with_raster.tex
===================================================================
--- docs/trunk/english_us/user_guide/working_with_raster.tex 2011-07-28 08:50:09 UTC (rev 15893)
+++ docs/trunk/english_us/user_guide/working_with_raster.tex 2011-07-28 10:33:56 UTC (rev 15894)
@@ -65,6 +65,8 @@
\item \dropmenuopt{Zoom to best scale (100\%)}
\item \dropmenuopt{Show in overview}
\item \dropmenuopt{Remove}
+\item \dropmenuopt{Set layer CRS}
+\item \dropmenuopt{Set project CRS from layer}
\item \dropmenuopt{Properties}
\item \dropmenuopt{Rename}
\item \dropmenuopt{Add Group}
@@ -81,7 +83,7 @@
There are several tabs on the dialog:
\begin{itemize}[label=--]
- \item \tab{Symbology}
+ \item \tab{Style}
\item \tab{Transparency}
\item \tab{Colormap}
\item \tab{General}
@@ -96,13 +98,13 @@
\caption{Raster Layers Properties Dialog \nixcaption}\label{fig:raster_properties}
\end{figure}
-\subsection{Symbology Tab}\label{label_sombology}
+\subsection{Style Tab}\label{label_sombology}
QGIS can render raster layers in two different ways :\index{raster layers!supported channels}
\begin{itemize}[label=--]
\item Single band - one band of the image will be rendered as gray or in
-pseudocolors.
+pseudocolor or a freak out.
\item Three band color - three bands from the image will be rendered, each
band representing the red, green or blue component that will be used to create
a color image.
@@ -135,10 +137,10 @@
QGIS can restrict the data displayed to only show cells whose values are
within a given number of standard deviations of the mean for the
-layer.\index{raster layers!standard deviation} This is useful when you have one or
-two cells with abnormally high values in a raster grid that are having a
-negative impact on the rendering of the raster. This option is only available
-for pseudocolor images.
+layer.\index{raster layers!standard deviation} This is useful when you have
+one or two cells with abnormally high values in a raster grid that are having
+a negative impact on the rendering of the raster. This option is only available
+for pseudocolor and freak out images.
\minisec{Three band color}
@@ -148,7 +150,6 @@
Also scaling of colors are available.
-
\begin{Tip}\caption{\textsc{Viewing a Single Band of a Multiband Raster}}
If you want to view a single band (for example Red) of a multiband
image, you might think you would set the Green and Blue bands to ``Not
@@ -159,13 +160,8 @@
\subsection{Transparency Tab} \label{rastertab:transparency}
QGIS has the ability to display each raster layer at varying transparency
-levels.\index{raster layers!transparency} Use the transparency slider to indicate to
-what extent the underlying layers (if any) should be visible though the
-current raster layer.
-This is very useful, if
-you like to overlay more than one rasterlayer, e.g. a shaded relief-map
-overlayed by a classified rastermap. This will make the look of the map
-more three dimensional.
+levels.\index{raster layers!transparency} Use the transparency slider to indicate to what extent the underlying layers (if any) should be visible though the current raster layer.
+This is very useful, if you like to overlay more than one rasterlayer, e.g. a shaded relief-map overlayed by a classified rastermap. This will make the look of the map more three dimensional.
Additionally you can enter a rastervalue, which should be treated as
{\em NODATA}. This can be done manually or with the
@@ -198,14 +194,13 @@
quite a lot of work. Therefore you can use the button
\toolbtntwo{mActionFileSave}{Export to file} to save your
transparency-list to a file. The button
-\toolbtntwo{mActionAddRasterLayer}{Import from file} loads your
+\toolbtntwo{mActionFolder.png}{Import from file} loads your
transparency-settings and applies them to the current rasterlayer.
\subsection{Colormap} \label{label_colormaptab}
-% FIXME: Write me
The \tab{Colormap} tab is only available, when you have selected a
-single-band-rendering within the tab \tab{Symbology} (see chapt. \ref{label_sombology}).
+single-band-rendering within the \tab{Style} tab (see chapt. \ref{label_sombology}).
Three ways of color interpolation are available:
\begin{itemize}[label=--]
@@ -214,19 +209,19 @@
\item Exact
\end{itemize}
-The button \button{Add Entry} adds a color to the individual color-table.
-Double-Clicking on the value-column lets you inserting a specific value.
-Double clicking on the color-column opens the dialog \dialog{Select
-color} where you can select a color to apply on that value.
+The button \button{Add Entry} adds a color to the individual color-table.
+\button{Delete Entry} deletes a color from the individual color-table and the
+\button{Sort} sorts the color table according to the pixel values in the
+value column. Double-Clicking on the value-column lets you inserting a
+specific value. Double clicking on the color-column opens the dialog
+\dialog{Select color} where you can select a color to apply on that value. Further you can also add labels for each color but this value won't be displayed when you use the identify feature tool.
Alternatively you can click on the button
-\toolbtntwo{mActionNewAttribute}{Load colormap from Band}
-, which tries to
-load the table from the band (if it has any).
+\toolbtntwo{mActionNewAttribute}{Load colormap from Band}, which tries to load the table from the band (if it has any).
The block \guiheading{Generate new color map} allows you to create newly
categorized colormaps. You only need to select the \selectnumber{number of
-classes}{15} you need and press the button \button{Classify}. Currently
+classes}{15} and press the button \button{Classify}. Currently
only one \selectstring{Classification mode}{Equal Interval} is
supported\index{raster layer!classify}.
@@ -241,8 +236,8 @@
check the checkbox and set an appropriate scale where your data will be
displayed in the map canvas.
-Also the spatial reference system is printed here as a PROJ.4-string.
-This can be modified by hitting the \button{Change} button.
+Also the coordinate reference system (CRS) is printed here as a PROJ.4-string.
+This can be modified by hitting the \button{Specify} button.
\subsection{Metadata Tab}\label{label_metatab}
@@ -282,22 +277,23 @@
\subsection{Histogram Tab}\label{label_histogram}
-The \tab{Histogram} tab allows you to view the distribution\index{raster layers!histogram}
-of the bands or colors in your raster. You must first generate the raster statistics
-by clicking the \button{Refresh} button. You can choose which bands to display by
-selecting them in the list box at the bottom left of the tab. Two different
-chart types are allowed:
+The \tab{Histogram} tab allows you to view the distribution\index{raster
+layers!histogram} of the bands or colors in your raster. It is generated
+automaticaly when you open \tab{Histogram} tab. You can choose which bands to display by selecting them in the list box at the bottom left of the tab.
-\begin{itemize}[label=--]
-\item Bar chart
-\item Line graph
-\end{itemize}
+%% FIXME not supported at the moment
+%Two different chart types are allowed:
+%
+%\begin{itemize}[label=--]
+%\item Bar chart
+%\item Line graph
+%\end{itemize}
+%
+%You can define the number of chart columns to use and decide whether you want
+%to \checkbox{Allow approximation} or display \checkbox{out of range} values
+%Once you view the histogram, you'll notice that the band statistics have been
+%populated on the \tab{metadata} tab.\index{raster layers!metadata)}
-You can define the number of chart columns to use and decide whether you want
-to \checkbox{Allow approximation} or display \checkbox{out of range} values
-Once you view the histogram, you'll notice that the band statistics have been
-populated on the \tab{metadata} tab.\index{raster layers!metadata)}
-
\begin{Tip}\caption{\textsc{Gathering Raster Statistics}}
To gather statistics for a layer, select pseudocolor rendering and
click the \button{Apply} button. Gathering statistics for a layer can be time
@@ -338,4 +334,10 @@
With the \checkbox{Result to project} checkbox the result layer will automatically
added to the legend area and can be visualized.
+\section{Raster Analysis}\label{sec:raster_analysis}
+\index{Raster!raster analysis}
+\index{Raster analysis}
+
+Apart from the raster calculator, additional raster analysis in \qg 1.7 is provided by the GDALTools core plugin. Please refer to section \ref{label_plugingdaltools} for more information.
+
\FloatBarrier
Modified: docs/trunk/english_us/user_guide/working_with_raster_screenies/rasterPropertiesDialog.png
===================================================================
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Modified: docs/trunk/english_us/user_guide/working_with_raster_screenies/raster_calculator.png
===================================================================
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